You can evaluate the relative quality of many of these works for yourself. Some of them merely pretend to be serious spirituality, while in reality they contain nothing but personal opinions or eccentric interpretations which square with neither the texts nor tradition. Above all, avoid commentaries which advertise themselves as 'new applications of the Word', but really exploit the Word for their own purposes. Exercise some caution even with the spiritual commentaries you find in both the ferial and the festive lectionaries. Sometimes these interpretations of the texts are a little forced and reflect the personality and words of the writers more thon they do the Word of God. 

'Listening is not just passively receiving a given text. It also consists in the believer's effort to penetrate the text, to get to the bottom of the divine Word and find its unequivocal meaning. It is related to working diligently and tenaciously to apply the Word to one's life', says Origen.

All these exegetical, patristic and spiritual commentaries are certainly useful tools for meditation and for our personal growth in understanding. Yet in lectio divina what is important is that our effort be personal. It need not necessarily be private. All effort is more fruitful within the daily, lived experience of a community, a brotherhood or sisterhood, for it is in relationship to others that one truly becomes a disciple of the Word. In community, the Word is not just read together but lived and experienced together.